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Rel. frost
Last spring frost (0°C) 24 Mar Normal year · 20 years of data
Frost-free season 253 days 24 Mar – 2 Dec

Vegetables

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Cauliflower
Brassica oleracea (Botrytis-gruppen)
3 – 17 Feb
21 Jun
5-7 wk
24 Mar
26 Jul
0 wk
18 Mar
16 Jul
1 wk before
Broccoli
Brassica oleracea (Italica-gruppen)
10 – 24 Feb
3 Jul
4-6 wk
24 Mar
31 Jul
0 wk
18 Mar
21 Jul
1 wk before
Chili pepper
Capsicum annuum
18 Feb – 18 Mar
25 Apr
8-12 wk
13 May
20 Jun
7 wk after
Curly Kale
Brassica oleracea (Curly Kale-gruppen)
Season too short
3 – 17 Feb
16 Jun
5-7 wk
24 Mar
21 Jul
0 wk
6 Feb
11 Jul
7 wk before
Garden cucumber
Cucumis sativus
15 – 22 Apr
5 Jul
3-4 wk
13 May
26 Jul
7 wk after
Florence Fennel
Foeniculum vulgare
8 – 15 Apr
13 Jun
4-5 wk
13 May
11 Jul
7 wk after
4 May
1 Jul
6 wk after
Butter bean
Phaseolus lunatus
Fleece
15 – 22 May
10 Jun
3-4 wk
12 Jun
1 Jul
11 wk after
Onion
Allium cepa (Cepa-gruppen)
30 Dec – 27 Jan
6 Apr
8-12 wk
24 Mar
1 Jun
0 wk
6 Apr
22 May
2 wk after
Onion (sets)
Allium cepa (Cepa-gruppen)
18 Mar
21 Jun
1 wk before
18 Mar
11 Jun
1 wk before
Maize
Zea mays
3 – 10 Apr
25 Jun
3-4 wk
1 May
16 Jul
5 wk after
Swiss Chard
Beta vulgaris (Flavescens-gruppen)
26 Feb – 5 Mar
10 Jul
3-4 wk
26 Mar
31 Jul
0 wk
6 Apr
21 Jul
2 wk after
Carrot
Daucus carota subsp. sativus var. sativus
24 Mar
11 Jul
0 wk
11 Mar
1 Jul
2 wk before
Palm Kale
Brassica oleracea (Palm Kale-gruppen)
Season too short
3 – 17 Feb
16 Jun
5-7 wk
24 Mar
21 Jul
0 wk
6 Feb
11 Jul
7 wk before
Potato
Solanum tuberosum
15 Feb – 1 Mar
13 Jun
4-6 wk
29 Mar
11 Jul
1 wk after
29 Mar
1 Jul
1 wk after
Ornamental Kale
Brassica oleracea (Ornamental-gruppen)
3 – 17 Feb
26 Jun
5-7 wk
24 Mar
31 Jul
0 wk
18 Mar
21 Jul
1 wk before
Pumpkin
Cucurbita pepo
15 – 22 Apr
15 Jul
3-4 wk
13 May
5 Aug
7 wk after
Beetroot
Beta vulgaris (Conditiva-gruppen)
26 Feb – 5 Mar
4 Jul
3-4 wk
26 Mar
25 Jul
0 wk
6 Apr
15 Jul
2 wk after
Red Cabbage
Brassica oleracea (Red Cabbage-gruppen)
Season too short
10 – 24 Feb
28 Jun
4-6 wk
24 Mar
26 Jul
0 wk
Lettuce
Lactuca sativa
24 Feb – 3 Mar
15 Jul
3-4 wk
24 Mar
5 Aug
0 wk
18 Mar
26 Jul
1 wk before
Savoy Cabbage
Brassica oleracea (Savoy Cabbage-gruppen)
Season too short
10 – 24 Feb
28 Jun
4-6 wk
24 Mar
26 Jul
0 wk
Shallot (bulbs)
Allium cepa (Aggregatum-gruppen)
11 – 25 Feb
7 Jun
2-4 wk
11 Mar
21 Jun
2 wk before
11 Mar
11 Jun
2 wk before
Shallot (sets)
Allium cepa (Aggregatum-gruppen)
18 Mar
21 Jun
1 wk before
18 Mar
11 Jun
1 wk before
Spinach
Spinacia oleracea
24 Feb – 3 Mar
30 Jul
3-4 wk
24 Mar
20 Aug
0 wk
4 Mar
10 Aug
3 wk before
Sweet potato
Ipomoea batatas
25 Apr – 9 May
4-6 wk
6 Jun
11 wk after
Garden tomato
Solanum lycopersicum
6 – 20 Mar
4 Jun
6-8 wk
1 May
16 Jul
5 wk after
Tomatillo
Physalis ixocarpa
Common Bean
Phaseolus vulgaris
3 – 17 Apr
17 Jul
2-4 wk
1 May
31 Jul
5 wk after
4 May
21 Jul
6 wk after
White Cabbage
Brassica oleracea (White Cabbage-gruppen)
Season too short
10 – 24 Feb
28 Jun
4-6 wk
24 Mar
26 Jul
0 wk
Garden pea
Pisum sativum
24 Feb – 3 Mar
30 Jun
3-4 wk
24 Mar
21 Jul
0 wk
18 Mar
11 Jul
1 wk before

Herbs

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Basil
Ocimum basilicum
1 – 15 Apr
23 Jun
4-6 wk
13 May
21 Jul
7 wk after
Lemon balm
Melissa officinalis
13 – 27 Jan
26 May
8-10 wk
24 Mar
21 Jul
0 wk
19 Apr
11 Jul
4 wk after
Dill
Anethum graveolens
18 Mar
31 Jul
1 wk before
Wild chives
Allium schoenoprasum
Season too short
27 Jan – 10 Feb
9 Jun
6-8 wk
24 Mar
21 Jul
0 wk
18 Feb
11 Jul
5 wk before
Spearmint
Mentha spicata
30 Dec – 27 Jan
26 May
8-12 wk
24 Mar
21 Jul
0 wk
19 Apr
11 Jul
4 wk after
Coriander
Coriandrum sativum
24 Mar
20 Aug
0 wk
6 Apr
10 Aug
2 wk after
Garden sage
Salvia officinalis
Season too short
13 – 27 Jan
11 May
8-10 wk
24 Mar
6 Jul
0 wk
Common thyme
Thymus vulgaris
Season too short
13 – 27 Jan
16 May
8-10 wk
24 Mar
11 Jul
0 wk
Oregano
Origanum vulgare
27 Jan – 10 Feb
30 May
6-8 wk
24 Mar
11 Jul
0 wk
19 Apr
1 Jul
4 wk after
Parsley
Petroselinum crispum
27 Jan – 10 Feb
30 May
6-8 wk
24 Mar
11 Jul
0 wk
18 Mar
1 Jul
1 wk before
Rosemary
Salvia rosmarinus
18 Dec – 15 Jan
12 Apr
10-14 wk
26 Mar
21 Jun
0 wk

Annual flowers

Plant Sow indoors Transplant Direct sow
Earliest Latest Growing time Earliest Latest Rel. frost Earliest Latest Rel. frost
Morning glory
Ipomoea tricolor
15 – 22 Apr
30 Jun
3-4 wk
13 May
21 Jul
7 wk after
Cornflower
Centaurea cyanus
24 Mar
21 Jul
0 wk
18 Mar
11 Jul
1 wk before
Statice
Limonium sinuatum
20 Feb – 6 Mar
16 May
8-10 wk
1 May
11 Jul
5 wk after
Sweet William
Dianthus barbatus
27 Jan – 10 Feb
6-8 wk
24 Mar
0 wk
29 Mar
1 wk after
Snow-on-the-mountain
Euphorbia marginata
6 – 20 Mar
30 May
6-8 wk
1 May
11 Jul
5 wk after
6 Jun
1 Jul
11 wk after
Pinnate dahlia
Dahlia × pinnata
27 Feb – 13 Mar
30 May
6-8 wk
24 Apr
11 Jul
4 wk after
Pinnate dahlia (tubers)
Dahlia × pinnata
22 Feb – 22 Mar
13 Jun
4-8 wk
19 Apr
11 Jul
4 wk after
19 Apr
1 Jul
4 wk after
Foxglove
Digitalis purpurea
13 – 27 Jan
8-10 wk
24 Mar
0 wk
6 Apr
2 wk after
Busy lizzie
Impatiens walleriana
18 Feb – 18 Mar
11 Jul
8-12 wk
13 May
5 Sep
7 wk after
Creeping zinnia
Sanvitalia procumbens
6 – 20 Mar
9 Jun
6-8 wk
1 May
21 Jul
5 wk after
Hyacinth bean
Dolichos lablab
21 Apr – 5 May
19 May
4-6 wk
2 Jun
16 Jun
10 wk after
Chinese lantern
Physalis alkekengi
15 – 29 Jan
26 Apr
8-10 wk
26 Mar
21 Jun
0 wk
Love in a mist
Nigella damascena
24 Mar
6 Jul
0 wk
18 Mar
26 Jun
1 wk before
Strawflower
Xerochrysum bracteatum
6 – 20 Mar
20 May
6-8 wk
1 May
1 Jul
5 wk after
6 Jun
21 Jun
11 wk after
Purple-top vervain
Verbena bonariensis
1 – 29 Jan
26 Apr
8-12 wk
26 Mar
21 Jun
0 wk
Cardoon
Cynara cardunculus
6 Feb – 6 Mar
27 Mar
8-12 wk
1 May
22 May
5 wk after
Regal-foxtail
Ptilotus nobilis
18 Feb – 18 Mar
16 May
8-12 wk
13 May
11 Jul
7 wk after
Globe amaranth
Gomphrena globosa
18 Mar – 1 Apr
30 May
6-8 wk
13 May
11 Jul
7 wk after
Corn poppy
Papaver rhoeas
24 Mar
21 Jul
0 wk
18 Mar
11 Jul
1 wk before
Snapdragon
Antirrhinum majus
30 Dec – 27 Jan
16 May
8-12 wk
24 Mar
11 Jul
0 wk
29 Mar
1 Jul
1 wk after
Flossflower
Ageratum houstonianum
4 – 18 Mar
26 May
8-10 wk
13 May
21 Jul
7 wk after
Sweet pea
Lathyrus odoratus
27 Jan – 17 Feb
6 Jun
5-8 wk
24 Mar
11 Jul
0 wk
Stock
Matthiola incana
27 Jan – 10 Feb
9 Jun
6-8 wk
24 Mar
21 Jul
0 wk
6 Apr
11 Jul
2 wk after
Wormwood
Artemisia absinthium
Season too short
27 Jan – 10 Feb
10 May
6-8 wk
24 Mar
21 Jun
0 wk
11 Mar
11 Jun
2 wk before
Mexican sunflower
Tithonia rotundifolia
1 – 15 Apr
8 Jun
4-6 wk
13 May
6 Jul
7 wk after
Garden pansy
Viola × wittrockiana
Season too short
13 – 27 Jan
26 May
8-10 wk
24 Mar
21 Jul
0 wk
4 Mar
11 Jul
3 wk before
Petunia
Petunia
6 Feb – 6 Mar
16 May
8-12 wk
1 May
11 Jul
5 wk after
Sweet Scabious
Scabiosa atropurpurea
29 Jan – 12 Feb
10 May
6-8 wk
26 Mar
21 Jun
0 wk
4 May
11 Jun
6 wk after
Common zinnia
Zinnia elegans
20 Mar – 3 Apr
23 Jun
4-6 wk
1 May
21 Jul
5 wk after
Common morning glory
Ipomoea purpurea
8 – 22 Apr
30 Jun
3-5 wk
13 May
21 Jul
7 wk after
Garden cosmos
Cosmos bipinnatus
20 Mar – 3 Apr
13 Jun
4-6 wk
1 May
11 Jul
5 wk after
4 May
1 Jul
6 wk after
Scarlet milkweed
Asclepias curassavica
10 Mar – 7 Apr
15 Jun
8-12 wk
2 Jun
10 Aug
10 wk after
Bee balm
Monarda didyma
30 Dec – 27 Jan
26 Apr
8-12 wk
24 Mar
21 Jun
0 wk
19 Apr
11 Jun
4 wk after
Yarrow
Achillea millefolium
Season too short
27 Jan – 10 Feb
10 Apr
6-8 wk
24 Mar
22 May
0 wk
11 Mar
12 May
2 wk before
Safflower
Carthamus tinctorius
24 Mar
21 Jun
0 wk
18 Mar
11 Jun
1 wk before
Iceland poppy
Papaver nudicaule
Season too short
27 Jan – 10 Feb
30 May
6-8 wk
24 Mar
11 Jul
0 wk
6 Feb
1 Jul
7 wk before
Bishop's flower
Ammi majus
10 – 24 Feb
13 Jun
4-6 wk
24 Mar
11 Jul
0 wk
6 Apr
1 Jul
2 wk after
Drumsticks
Pycnosorus globosus
18 Feb – 4 Mar
12 Apr
10-12 wk
13 May
21 Jun
7 wk after
Sunflower
Helianthus annuus
3 – 10 Apr
20 Jun
3-4 wk
1 May
11 Jul
5 wk after
19 Apr
1 Jul
4 wk after
China aster
Callistephus chinensis
6 – 20 Mar
9 Jun
6-8 wk
1 May
21 Jul
5 wk after
4 May
11 Jul
6 wk after
Annual phlox
Phlox drummondii
20 Feb – 6 Mar
9 Jun
6-8 wk
17 Apr
21 Jul
3 wk after
4 May
11 Jul
6 wk after
Hollyhock
Alcea rosea
27 Jan – 10 Feb
6-8 wk
24 Mar
0 wk
6 Apr
2 wk after
Alpine delphinium
Delphinium elatum
30 Dec – 27 Jan
26 Apr
8-12 wk
24 Mar
21 Jun
0 wk
19 Apr
11 Jun
4 wk after
African marigold
Tagetes erecta
6 – 20 Mar
9 Jun
6-8 wk
1 May
21 Jul
5 wk after
Black-eyed Susan
Rudbeckia hirta
29 Jan – 12 Feb
30 May
6-8 wk
26 Mar
11 Jul
0 wk
4 May
1 Jul
6 wk after
Wood sage
Salvia nemorosa
13 – 27 Jan
16 Apr
8-10 wk
24 Mar
11 Jun
0 wk
19 Apr
1 Jun
4 wk after
Black-eyed susan vine
Thunbergia alata
4 Mar – 1 Apr
9 Jun
6-10 wk
13 May
21 Jul
7 wk after
California goldenpoppy
Eschscholzia californica
24 Mar
21 Jul
0 wk
18 Mar
11 Jul
1 wk before
Painted tongue
Salpiglossis sinuata
20 Feb – 6 Mar
16 May
8-10 wk
1 May
11 Jul
5 wk after
Water forget-me-not
Myosotis scorpioides
Season too short
27 Jan – 10 Feb
10 May
6-8 wk
24 Mar
21 Jun
0 wk
11 Mar
11 Jun
2 wk before